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Chapter 3: Configuring Unchannelized OCx/STMx Interfaces
packet sizes from 64–1518 bytes or a mixture of packet sizes that represent Internet
mix traffic (IMIX).
OCx/STMx ATM IOAs
The ES2 4G LM pairs with the ES2-S1 OC3-8 STM1 ATM IOA to deliver unchannelized
OC3/STM1 ATM operation through eight line interfaces. You can install the ES2-S1
OC3-8 STM1 ATM IOA in both IOA bays.
The ES2 4G LM also pairs with the ES2-S1 OC12-2 STM4 ATM IOA to deliver
unchannelized OC12/STM4 ATM operation through two line interfaces. You can install
the ES2-S1 OC12-2 STM4 ATM IOA in both IOA bays.
The interface stack for both of these IOAs is the same as for OCx/STMx/DS3-ATM
interfaces. (See Figure 5 on page 78.)
OCx/STMx POS IOAs
The ES2 4G LM pairs with the ES2-S1 OC12-2 STM4 POS IOA to deliver unchannelized
OC12/STM4 POS operation through two line interfaces. You can install the ES2-S1
OC12-2 STM4 POS IOA in both IOA bays.
The ES2 4G LM also pairs with the ES2-S1 OC48 STM16 POS IOA to deliver
unchannelized OC48/STM16 POS operation through one line interface. In the current
release, you can install the ES2-S1 OC48 STM16 POS IOA in only one of the IOA bays
per slot.
Figure 7 on page 81 shows the interface stack for OCx/STMx POS interfaces on the
ES2 4G LM.
Figure 7: Interface Stack for OCx/STMx POS Interfaces
Numbering Scheme
When configuring or managing an interface, you must know the numbering scheme
for identifying an interface. The numbering scheme depends on the type of E Series
router that you have.
81
Platform Considerations
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